Not a week goes by where we don't hear about some random service sending your data to Google and Facebook, be it tax services, hospitals, etc.

Google and Facebook are like the world's biggest online stalkers, and Microsoft is desperately playing catch-up with them. You know, after Microsoft spent most of the 1990s thinking that the Internet was a fad which would go nowhere. But that was before the light bulb of "collecting as much data as possible about people and monetizing it in any practical manor" came on, while the prospect of selling operating systems simultaneously melted away.